Firearm.



G. HAMMOND.

FIREARM.

APPLICATION FILED JUNE 9, I914- 1,140',513. u Patented May 25, 1915.

. 25 17 v 72' y y Z I 1/ /2 10 46 w 46" O r Z .l 365 :1 fi 7 77 3/ 22' 16 1/ Q 56 43 392-9 1 IN VENTOR.

ORNEY.

nman STATES FATE onnio z.

GRANT HAMMOND, or HARTFORD, connncrrconnssrenon or. ONE-THIRD TQ ALVA. c. wasnsunnn, or rrr'rsmnno, MASSACHUSETTS; AND ONE-THIRD rornnnnarex a. CRANE, or DAL'J ON, MASSACHUSETTS.

FIREARM.

1,140,513, Specification of Letters latent. Patented May 25, 1915,

Application filed J'une 9,1914. Serial 110.843,!)92. I

To all whom vltmay concern: gases of explosion, carrying with it the rear Be it known that 1, GRANT HAMMOND, a part 13, the two parts being secured tocitizen of the United States, residing at gether, and a spring 14'is employed for Hartford, in the county of Hartford and moving the case in the opposite direction or 3 State of Connecticut, have invented a'new backward. In this operation the gases exand Improved Firearm, of which the fol pan-d into an expanding chamber 46 belowing is a specification. tween a tube 47 and a sleeve 48 upon which My invention relates more especially to sleeve the forward part 12 of the case has a that class of firearms in which the 'operasliding fit. The sleeve 48 is secured to the tions of loading, ejecting of shells, and so end of the barrel 10 as by means of interforth, are performed automatically,- and an engaging screw threads, and the tube 47 object of my invention, among others, is to is secured as by means of interengaging provide a firearm of this class that shall'be screw threads within the end of the forsimple in construction and particularly efiiward part 12 of the case, holes 49 in the end 5 cient in operation. of the tube being provided to receive a span- One form of firearm embodying my inner wrench by means of which said tube vention and in the, construction and use of may be removed. A breech-bolt 15 is rotawhich the objects herein set out, as well as tably and longitudinally movable in the reothers, may be attained, is illustrated in the ceiver 11, this breech-bolt having a cam 0 accompanying drawings, in which groove 16 that receives the inner end of'a Figure 1 is a view in side elevation of a breech-bolt locking bolt 17, movably mountfirearm embodying my invention, with parts ed in a locking bolt support 18 pivotally atbroken away to show construction. Fig. 2 tached to a lug 19 projecting from the suris a top plan view, with parts broken away face of the rear part 13 of the case.

5 to show construction. Fig. 3 is a top plan A firing pin sleeve 37 containing a firing view of the back part of the firearm with pin and having ahead 31 is located in the the locking bolt support-removed. Fig. 4 is breech-bolt, a latch 38 on the head engaging a detail View showing the construction of a notch 45 in the end of the breech-bolt to the locking bolt and its actuator, the parts hold the bolt and firing pin sleeve at times 0 being disconnected. Fig. 5 is a detail side against relative turning movement under view of the locking bolt support. Fig. 6 is the influence of a spring 39. In assembling a detail view, partially in section, showing the parts, the firing pin sleeve is inserted the arrangement of the breech bolt actu within the breech-bolt, a lug on said sleeve ating lever, the breech bolt and firing pin passing through a groove formed length- :5 sleeve, the latter being unlocked from'the wise on the inner surface of the breech-bolt breech bolt. Fig. 7 is a like view, omitting and into registry with an annular groove on the breech bolt actuating lever, the breech the inner surface of the breech-bolt. Relabolt being shown in full and in locked entive rotating movement is now given to the -gagement with the firing pin sleeve. firing pin sleeve and breech-bolt in opposi- LO In the accompanying drawings the nution to said spring untilthe latch 38 enmeral 6 indicates the handle, 7 the trigger gages the notch 45 in the end of the boltto guard, 8 the trigger, 9 the hammer, 10 the hold the sleeve and bolt from relative turnbarrel and 11 the receiver, a portion of ing movement, as shown in Fig. 7 of the which composes the frame of my improved drawings, this movement having passed the t5 firearm, that as to such parts, may be of lug on the firing pin sleeve into the annular any preferred form of construction. groove in the wall of the breech-bolt to hold My invention pertains especially to the two parts from relative longitudinal means for locking the slide with the breechmovement. The lug 40 containing the latch bolt, and detailed description of the conon the firing pin sleeve is now in line with 50 struction and operation of other parts is one of the lugs 33 on the breech-bolt. The

therefore omitted, as will be understood breech-bolt is inserted in the receiver 11, the

from the following general description.

- Briefly stated, the forward part 12 of the case is moved forward by the force of the lugs 33 passing into longitudinal grooves in the inner wall of the receiver, the lug 40 passing into one of said grooves, to an extent to cause the lugs 33 to register with an annular groove on the inner wall of the retransversely to the locking bolt 17 to re-n ceive a locking bolt actuator 21 that also extends through an opening in the locking bolt. The lower end of the locking bolt has a projection 22 formed to engage a hole 23 in the cam groove 16 in the breech-bolt. The actuator has a locking cam' surface 24. and an unlocking cam surface 25 to engage the edges of the opening 20 to move the locking,

bolt into locked or unlocked position with respect to the breech-bolt. The actuator has holders 2627 which are projections having straight ends terminating the cam surfaces, these straight ends being adapted to be lo cated substantially in line with the inner edges of the opening 20 so that when engaged with the walls of said opening they will offer positive resistance to movement of. said bolt into the opening 23 at certain times, or out of said opening at other times.

A spring ,pressed plunger 28 is located in a recess in the lug 19, the end of this plunger engaging a shoulder on the support to hold the latter in its normal position with the locking bolt placed to effect its function. The bolt projects through a slot 29 in an extractor 30 attached to the head 31 of the firing pin sleeve, upon which the breechbolt is partially. supported.

In the operation of the firearm the case composed of the parts 12 and 13 is carried forward by the force caused by the gases of explosion and against the tension of the' spring 14, carrying with it the locking bolt support 18 and breech-bolt locking bolt 17 andthe latter, moving in the cam groove 16,

' and, acting against the cam 32, rotates the breech-bolt to its unlocked position, whereby the lugs 33 on the breech-bolt will register with the longitudinal grooves in the receiver so-that the breech-bolt may be moved.

rearwardly. In this movement of the case, the locking bolt support and the locking bolt, the bolt actuator 21 is carried against the end wall 34 of the opening in the receiver, this pushing the actuator backward and causing the cam 24 to act upon the lower edge of the opening 20 in the locking bolt and move it downward, and the projection 22 into the hole 23. The straight surface on the end of the holder 26 on the actuator 21 is thus caused to engage with the opening through the locking bolt and hold it against unlocking movement. As the parts thus described are promptly moved backward under the influence of the spring 14, as they reach the backward limit of their play, the rear end of the actuator 21 strikes the back wall 35 of the opening in the receiver, whichcauses the actuator to be moved forward, and the unlocking cam 25 engaging the upper wall of the opening 20 moves the locking bolt out of locked engagement with the breech-bolt, and the flat part on the end of the holder 27 on the actuator 21 is engaged with the upper wall of the opening 20 thus directly opposing movement of the locking bolt in its support until the actuator is directly moved from this position. When the locking bolt is thus disengaged, the lever 36 pressing against a lug 42 of the breech-bolt will be actuated, as by a spring 41 to move the breech-bolt forward, and the latch 38. engaging the end of the'receiver is disengaged from the notch 45 in the end of the breech bolt and the latter is rotated to its locked position in the manner hereinbefore described. By moving the plunger 28 backwardly the locking bolt support 18 may be swung on its pivot to remove the locking bolt from the cam groove 16 and thus permit the breech-bolt to be taken out of the firearm when desired.

While I have shown and described herein a preferred construction of mechanism for accomplishing my purpose, this may be departed from to a greater or lesser degree and yet be within the spirit and intent of the Invention. I i I claim 1. A firearm including a frame, a case movably mounted thereon, a longitudinally movable breech-bolt, a locking bolt mounted on the case, means for locking the locking bolt with and for unlocking it from the .breech-bolt, means for positively holding the 1 locking bolt in locked engagement with the breech-bolt, means for moving the breechbolt to a closed position, and means for locking it in its closed position.

2. A firearm including a frame, a case I -movably mounted thereon, a longitudinally movable breech-bolt, alocking bolt support carried by the case, a locking bolt movably mounted on said support, means for locking the locking bolt with and for unlocking it I from. the breech-bolt, means for positively holding the locking bolt in engagement with the breech-bolt, means for moving the breech-bolt to closed position, and means for looking it in its closed position.

3. A firearm including a frame, a case movably mounted upon the frame, a longitudinally movable breech-bolt having a cam groove, a locking bolt carried by the case and projecting into said cam groove, means for 1 looking the locking bolt with and for unlocking it from the breech-bolt, means for moving the breech-bolt to closed osition, and means for looking it inthis position.

4. A firearm including a frame, a case movably mounted on' the frame a longitudinally movable breech-bolt having a cam groove and a hole in said groove, a locking bolt carried by the case, means for engaging the locking bolt within said hole and for. disengaging it therefrom, means formoving the breech-bolt to closed position, and means for holding it in this position.

5. A firearm including a frame, a case movably mounted on the frame, a longitudinally movable breech-bolt having a cam groove, a locking bolt carried by the case and with its end located in said groove, means for locking the locking bolt with and for unlocking it from the breech-bolt, means for positively holding the locking bolt in locked engagement with the breech-bolt, means for moving the breech-bolt to closed position, and means for looking it in this position.

6. A firearm including a frame, a case movably mounted on theframe, a longitudinally movable breech-bolt having a cam groove, a locking bolt mounted on the case, an actuator extending through the locking bolt, means for moving the actuator to operate the locking bolt to engage it with the breech-bolt, means for moving the breechbolt to closed position, and means for locking it in this position.

A firearm including a frame, a case movably mounted on the frame, a longitudinally movable breech-bolt having a cam groove with. ahole in the bottom said groove, a locking bolt carried by the case,

an actuator projecting through the locking bolt in position to engage an end wall of an opening in the frame to move the locking bolt into engagement with said hole, means for disengaging the locking bolt from said hole, means for moving the breech-bolt to closed position, and means for locking it in this position. i

8. A firearm including a frame, a case movably mounted on the frame, a longitudinally movable breech-bolt having a cam groove with a hole in the bottom of said groove, a locking bolt carried by the case, an actuator projecting through the locking bolt in position to engage the end walls of the openings in the frame to move the looking bolt into engagement with and to disengage it from said hole, means for moving the breech-bolt to closed position; and means for looking it in this position.

9. A firearm includlng a frame, a longitudinally movable breech-bolt mounted in the frame, a movable support for a locking bolt, means for moving the support, the locking bolt carried by said support, means for moving the locking bolt into locked engagement with the breech-bolt, means for holding it positively in locked engagement therewith, means for unlocking it from the breech bolt, meansfor moving the breechbolt to closed position, and means for locking it in this position.

10. A firearm including a frame, a longitudinally movable breech-bolt rotatably mounted in the frameand having a cam groove, a movable support for a locking bolt, a locking bolt mounted in said sup- 'closed position, and means for looking it in this position. v

11. A firearm including a frame, a case movably mounted on the frame, a longitudinally movable breech-bolt mounted in the frame, a locking bolt support carried by the case, a locking bolt mounted in said sup-' port and having an opening, an actuator projecting through said opening, said actuator having a cam surface to actuate the locking bolt, means to engage the actuator to operate it, means for moving the breechbolt to closed position, and means for looking it in this position.

l2laA firearm including a frame, a case movably mounted on the frame, a longitudinally movable breech-bolt mounted in the frame, a locking bolt support carried by the case, a locking bolt mounted in said support and having an opening, an actuator projecting through said opening and having a cam surface to engage the locking bolt to operate it, a locking surface to positively hold the locking bolt against movement, means for operating the actuator, means for moving the breech-bolt to closed position, and means for looking it in this position.

13. A firearm including a frame, a case movably mounted on the frame, a locking bolt support carriedby the case, a longitudinally movable breech-bolt mounted in the frame, a locking bolt mounted in said-support and having an opening, an actuator movable laterally of the locking bolt and having a cam surface to move the latter, the frame having a part located in the path of movement of the actuator, means for moving the breech-bolt to closed position, and means for looking it in this position.

1 4. A firearm including a frame, a case movably mounted on the frame, a longitudinally movable breech-bolt mounted in the frame, a support mounted on the case, a locking bolt projecting through an opening in the support to engage the breech-bolt, an

&

actuator located in said support and projecting through the locking bolt and having a cam to move the locking bolt, said actuator being located in an opening in the support to engage the end Wall of thqframe, means fortmoving the breech-bolt to closed posi- 4 tion, and means for locking it in this position. r

15. A firearm including a frame, a case movably mounted on the frame, a longitudinally' movable breech-bolt located in theframe, a locking bolt support pivotally mounted on the case, a locking bolt mounted in said support, "an actuator mounted in said support and extending through the locking 1 

